LingBuzz: an archive of linguistic papers, but published and unpublished.

Snippets: Very short linguistics remarks that are meant to motivate research: published by Linguistic Inquiry (LI).

Language Description Heritage: A database of linguistics articles compiled by the Max Planck Society, Germany; these can be downloaded for free as PDFs.

Linguistics Style Sheets: These documents detail how to format data, references, in-line citations for a linguistics paper. There are slight variations, depending on which journal you look at, but the ones listed here are the foremost journals/stylesheets used in linguistics.

Linguistic Inquiry Style Sheet: Very detailed, automatically downloads as a PDF. Most journals or working papers in linguistics reference this style sheet.

Language Acquisition Style Sheet: A summary list of the rules, mirrors the Linguistic Inquiry Style Sheet, but provided in a more condensed, easily-read format.